Strain aging phenomena in aged Al-4.5Cu alloys and its computer simulation by a strain-softening model

R. Onodera, Tatsuya Morikawa

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A strain aging test was conducted at room temperature in aged Al-4.5Cu alloy. The stress-strain curve during restraining exhibited a peculiar shape (the stress plateau). Both the strain rate and the aging time strongly affected the aging phenomena. Two characteristics, the stress increase (the difference in the stress between before and after aging) and the transition strain (the strain during the stress plateau) were measured. The shape of the s-s curve and the two characteristics were successfully explained by phenomenological theory based on the strain-softening model constructed to explain the Portevin-LeChatelier effect.

Original languageEnglish
Pages (from-to)244-252
Number of pages9
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume65
Issue number4
DOIs
Publication statusPublished - Jan 1 2001

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precipitation hardening
plastic deformation
Aging of materials
computerized simulation
Computer simulation
plateaus
Stress-strain curves
Strain rate
curves
strain rate
room temperature
Temperature

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

Cite this

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AB - A strain aging test was conducted at room temperature in aged Al-4.5Cu alloy. The stress-strain curve during restraining exhibited a peculiar shape (the stress plateau). Both the strain rate and the aging time strongly affected the aging phenomena. Two characteristics, the stress increase (the difference in the stress between before and after aging) and the transition strain (the strain during the stress plateau) were measured. The shape of the s-s curve and the two characteristics were successfully explained by phenomenological theory based on the strain-softening model constructed to explain the Portevin-LeChatelier effect.

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